When Pinterest's latest data revealed that the search for "curtain fringes" had gone up 600% this year alone, we can't say we were surprised. One of the coolest haircuts of the '60s and '70s — heavy, cheekbone-skimming, softly cut fringe — has made a comeback as of late.

First popularized by the inimitable Brigitte Bardot, whose fringe began at her center parting and swept in a curve to her cheekbones, the effortless cut has spawned homages aplenty. Countless actresses — think Sienna...